//
//  VKRequestsScheduler.h
//
//  Copyright (c) 2015 VK.com
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy of
//  this software and associated documentation files (the "Software"), to deal in
//  the Software without restriction, including without limitation the rights to
//  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
//  the Software, and to permit persons to whom the Software is furnished to do so,
//  subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
//  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
//  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
//  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
//  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#import <Foundation/Foundation.h>
#import "VKObject.h"

@class VKRequest;

/**
* A singletone class for simple schedule requests. It used for preventing "Too many requests per second" error.
*/
@interface VKRequestsScheduler : VKObject
/// Returns an instance of scheduler
+ (instancetype)instance;

/// Used for enabling or disabling scheduler. If scheduler disabled, all next added requests will be sent immediately
- (void)setEnabled:(BOOL)enabled;

/// Adds requests to queue. If scheduler disabled, request starts immediately
- (void)scheduleRequest:(VKRequest *)req;

- (NSTimeInterval)currentAvailableInterval;
@end
